YOU SAID:

you grandmother is actually my best friends uncle

INTO JAPANESE

あなたのおばあちゃんは実は私の親友で、おじさんです

BACK INTO ENGLISH

Your grandmother is actually my best friend and uncle.

INTO JAPANESE

あなたのおばあちゃんは実は私の親友で叔父さんです。

BACK INTO ENGLISH

Your grandmother is actually my best friend and uncle.